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           <pre name="code" class="html"><!--<span style="font-family: Arial, Helvetica, sans-serif;"> JiaThis Button END --></span>

同时需要加上js

<script type="text/javascript" src="http://v3.jiathis.com/code/jia.js?uid=1" charset="utf-8"></script>

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原文：http://blog.csdn.net/comeonstone/article/details/41121203